I stopped by a local muffler shop yesterday and priced out a new exhaust for my 00' 5.4 XLT F150. From Cat, would cost 200 for 3" pipe, Single exhaust, behind rear wheel, and around 170 for 2.5" pipe same configuration. Using a Flowmaster it would cost around 30 bucks more for either setup. My question is, does anyone have any experience with the flowpro muffler, and what did you think of it? I am basically just looking for some more sound. Not sound that will make windows rattle, just some meaty growling. The guy at the shop recommended the Flowpro's. Any help would be appreciated!!!

 

my dad-in-law had flow pros on his ranger, and it was quite loud. if you are going for sound, that should really make some noise on the 5.4.

 

i had a full boar single in dual outlet muffler on my 98 4.6 and when i had it cut out and stragiht pipe put in, he told me that flo pro mufflers sound alot like full boars. Mine sounded good and rumbly but it wasnt loud enough for me. Also droned in the cab quite a bit, but overall it did sound good.